Buggy code:
public class Sound { public static Pattern sSoundPattern = Pattern . compile ( "\\[sound\\:([^\\[\\]]*)\\]" ) ; private static Pattern sUriPattern = Pattern . compile ( "^(([^://?#]+):)?(////([^//?#]*))?([^?#]*)(\\?([^#]*))?(#(.*))?$" ) ; private static MediaPlayer sMediaPlayer ; private static AudioManager sAudioManager ; private static OnCompletionListener sPlayAllListener ; private static WeakReference < Activity > sCallingActivity ; public static final int SOUNDS_QUESTION = 0 ; public static final int SOUNDS_ANSWER = 1 ; public static final int SOUNDS_QUESTION_AND_ANSWER = 2 ; private static HashMap < Integer , ArrayList < String > > sSoundPaths = new HashMap < Integer , ArrayList < String > > ( ) ; private Sound ( ) { } public static void resetSounds ( ) { } public static void resetSounds ( int which ) { } public static void addSounds ( String soundDir , String content , int qa ) { } public static Boolean makeQuestionAnswerList ( ) { } public static String expandSounds ( String soundDir , String content ) { } public static void playSounds ( int qa , WeakReference < Activity > activityRef ) { } public static void playSound ( String soundPath , OnCompletionListener playAllListener ) { } @ SuppressLint ( "NewApi" ) public static void playSound ( String soundPath , OnCompletionListener playAllListener , final VideoView videoView ) { Log . i ( TAG , ( ( ( "Playing<seq2seq4repair_space>" + soundPath ) + "<seq2seq4repair_space>has<seq2seq4repair_space>listener?<seq2seq4repair_space>" ) + ( Boolean . toString ( ( playAllListener != null ) ) ) ) ) ; if ( soundPath . substring ( 0 , 3 ) . equals ( "tts" ) ) { } else { final boolean isVideo ; if ( ( AnkiDroidApp . SDK_VERSION ) > 7 ) { String realPath ; try { realPath = new File ( soundPath . replace ( "file://////" , "" ) ) . getCanonicalPath ( ) ; } catch ( IOException e1 ) { realPath = soundPath ; } isVideo = ( ThumbnailUtils . createVideoThumbnail ( realPath , MINI_KIND ) ) != null ; } else { isVideo = false ; } <START_BUG> if ( ( isVideo && ( videoView == null ) ) && ( ( Sound . sCallingActivity . get ( ) ) != null ) ) { <END_BUG> Sound . sPlayAllListener = playAllListener ; ( ( com . ichi2 . anki . AbstractFlashcardViewer ) ( Sound . sCallingActivity . get ( ) ) ) . playVideo ( soundPath ) ; return ; } try { if ( ( Sound . sMediaPlayer ) == null ) { Sound . sMediaPlayer = new MediaPlayer ( ) ; } else { Sound . sMediaPlayer . reset ( ) ; } if ( ( Sound . sAudioManager ) == null ) { Sound . sAudioManager = ( ( AudioManager ) ( AnkiDroidApp . getInstance ( ) . getApplicationContext ( ) . getSystemService ( AUDIO_SERVICE ) ) ) ; } if ( isVideo && ( videoView != null ) ) { Sound . sMediaPlayer . setDisplay ( videoView . getHolder ( ) ) ; Sound . sMediaPlayer . setOnVideoSizeChangedListener ( new MediaPlayer . OnVideoSizeChangedListener ( ) { @ Override public void onVideoSizeChanged ( MediaPlayer mp , int width , int height ) { Sound . configureVideo ( videoView , width , height ) ; } } ) ; } Uri soundUri = Uri . parse ( soundPath ) ; Sound . sMediaPlayer . setDataSource ( AnkiDroidApp . getInstance ( ) . getApplicationContext ( ) , soundUri ) ; Sound . sMediaPlayer . setAudioStreamType ( STREAM_MUSIC ) ; Sound . sMediaPlayer . setOnPreparedListener ( new MediaPlayer . OnPreparedListener ( ) { @ Override public void onPrepared ( MediaPlayer mp ) { Sound . sMediaPlayer . start ( ) ; } } ) ; if ( playAllListener != null ) { Sound . sMediaPlayer . setOnCompletionListener ( playAllListener ) ; } Sound . sMediaPlayer . prepareAsync ( ) ; AnkiDroidApp . getCompat ( ) . requestAudioFocus ( Sound . sAudioManager ) ; } catch ( Exception e ) { Log . e ( TAG , ( ( ( "playSounds<seq2seq4repair_space>-<seq2seq4repair_space>Error<seq2seq4repair_space>reproducing<seq2seq4repair_space>sound<seq2seq4repair_space>" + soundPath ) + "<seq2seq4repair_space>=<seq2seq4repair_space>" ) + ( e . getMessage ( ) ) ) ) ; Sound . releaseSound ( ) ; } } } private static void configureVideo ( VideoView videoView , int videoWidth , int videoHeight ) { } public static void notifyConfigurationChanged ( VideoView videoView ) { } private static final class PlayAllCompletionListener implements OnCompletionListener { private final int mQa ; private int mNextToPlay = 1 ; private PlayAllCompletionListener ( int qa ) { } @ Override public void onCompletion ( MediaPlayer mp ) { } } private static void releaseSound ( ) { } public static void stopSounds ( ) { } private static String getSoundPath ( String soundDir , String sound ) { } private static boolean hasURIScheme ( String path ) { } public static OnCompletionListener getMediaCompletionListener ( ) { } public static boolean hasQuestion ( ) { } public static boolean hasAnswer ( ) { } }

Fix:
if ( ( ( isVideo && ( videoView == null ) ) && ( ( Sound . sCallingActivity ) != null ) ) && ( ( Sound . sCallingActivity . get ( ) ) != null ) ) {